Embossing and laminating device for web material

ABSTRACT

A device for embossing and laminating a multiple-web web material, comprising: a first and second embossing cylinder ( 1, 3 ), provided with tips and arranged with parallel and adjacent axes so as to farm a nip (G) between them; a pair of pressure rollers, ( 5, 7 ), each of which cooperates with one of the embossing cylinders; an adhesive applicator ( 17 ) associated with the first embossing cylinder; and a laminating roll ( 13 ) arranged downstream of the nip (G) between the embossing cylinders ( 1, 3 ) and cooperating with the first embossing cylinder ( 1 ). Planes (P 3 , P 5 ) contain axis ( 1 A,  3 A) of each embossing cylinder ( 1, 3 ) and the axis ( 5 A,  7 A) of the corresponding pressure roll ( 5, 7 ) are both inclined with respect to the plane. (P 2 ) containing the axes ( 1 A,  3 A) of the embossing cylinders at an angle different from 0 and 90 degrees.

TECHNICAL FIELD

The present invention relates to a device for embossing and laminatingcontinuous plies for forming a web material.

More particularly, the present invention relates to an embossing andlaminating device of the type comprising a pair of embossing cylinders,each co-operating with a respective pressure roll, with a glueapplicator for applying an adhesive onto at least one of the embossedplies, and with laminating means which cause joining together of twoplies separately embossed between each embossing cylinder and therespective pressure roll.

STATE OF THE ART

In the paper converting industry, for the production of toilet paper,all-purpose drying paper, paper napkins, tissue paper in general andsimilar products, embossing is frequently used in order to modify thecharacteristics of softness and absorbency of the paper.

Different embossing and joining systems exist for the production ofembossed web materials obtained by joining together several plies. Inparticular, there are systems in which the two or more plies ofcontinuous material are separately embossed and then joined together.These systems can be divided up basically into tip-to-tip joiningsystems and nested joining systems, so-called random nesting or “DERL”systems or the like.

In the first case (see EP-B-0,370,972), two plies are each embossedbetween an embossing cylinder, provided with projections or tipsarranged in a repetitive pattern, and a pressure roll, normally linedwith resilient material, such as rubber or the like. Subsequently thetwo plies are joined together by means of laminating between the twofacing embossing cylinders which are phase-synchronized with one anotherso that, in the laminating nip between the two cylinders, the tips ofone cylinder are located opposite the tips of the other one, thedistance between the cylinders being such as to cause laminating of theplies between the facing tips. Usually, before laminating, an adhesiveis applied onto one of the two plies, in the relief zones produced byembossing.

Nested-type embossing and joining together, on the other hand, involvesthe plies which are separately embossed in a similar manner to thatdescribed above being joined together so that the projections of one plyare arranged in between the projections of the other one. In such casesthe two embossing cylinders are not pressed against one another in thenip between them and the two plies are joined together by means oflaminating between one of the two embossing cylinders and a joiningroller. This technique is described in GB-B-1,225,440 and in U.S. Pat.No. 3,694,300.

Italian patent No. 1,213,842 (Application No. 9519A/87) describes anembossing unit of the tip-to-tip type which has been modified so as tobe able to produce nested embossing of the random type (“DERL”). This isobtained by introducing a deviating element which modifies the path ofone of the two plies between the embossing zone and the laminating zone.

Italian Utility Model Application No. 21,325B/89 describes a devicewhich allows embossing both of the nested type and embossing of thetip-to-tip type to be performed by modifying as required the arrangementof the components of the device. Basically, in order to change from onetype of processing to the other type, it is necessary to modify entirelythe arrangement of the embossing cylinders. In fact, according to thisknown technique, it is suggested basically to convert on each occasion aproper tip-to-tip embossing unit into a proper nested embossing unit.This involves very long operation times in order to pass from one typeof embossing system to the other. Moreover, in this device, in order tobe able to arrange the laminating roll in a position such that it isable to cooperate with one of the embossing cylinders, it hasbeennecessary to arrange the axes of the two embossing cylinders and the twopressure rolls on a single common horizontal plane. This involvesconsiderable drawbacks due to the deformations of the embossingcylinders, caused by the high pressures necessary for embossing, withconsequent non-uniform embossing and laminating of the plies between thecenter and the edges.

OBJECTS AND SUMMARY OF THE INVENTION

The object of the present invention is to provide anembossing/laminating device which is able to operate in tip-to-tip ornested mode and which allows easy conversion from one type of embossingto the other, reducing to a minimum the operations of adjustment andregulation of the device.

Yet another object of the present invention consists in providing aconfiguration which allows the existing embossing/laminating units, ofthe tip-to-tip-type, to be converted in a rapid and economic manner intodual-purpose embossing/laminating units suitable for producing embossedmaterial (comprising several glued plies) using the nested technique andthe tip-to-tip technique, alternately.

A further object of one improved embodiment of the present invention isthe provision of an embossing unit in which the embossing cylinders andthe pressure rolls are arranged so as to reduce the irregularities inthe laminated product due to the flexural deformations of the embossingcylinders.

These and further objects and advantages, which will become clear tothose skilled in the art from reading of the text which follows, areobtained in an embossing and laminating device of the type comprising: afirst and a second embossing cylinder, provided with associated tips orprojections, said two embossing cylinders being arranged with parallelaxes and arranged adjacent to one another so as to form a nip betweenthem; a pair of pressure rolls, each of which co-operates with one ofthe embossing cylinders; an adhesive applicator associated with thefirst embossing cylinder; and a laminating roll arranged downstream ofthe nip between the embossing cylinders and cooperating with the firstembossing cylinder. Basically, according to the invention it isenvisaged that the planes containing the axis of each embossing cylinderand the axis of the corresponding pressure roll are both inclined withrespect to the plane containing the axes of the embossing cylinders atan angle different from 0° and 90° and that the angle formed by theplane containing the axis of the first embossing cylinder and therespective pressure roll with the plane containing the axes of the twoembossing cylinders and directed towards said nip is greater than 90°.Moreover, it is envisaged that said two embossing cylinders should havethe same peripheral speeds and that they may be phase-synchronized witheach other so as to bring the tips of one embossing cylinder oppositethe tips of the other embossing cylinder, or alternatively cause thetips of one embossing cylinder to engage in between the tips of theother embossing cylinder, without necessarily modifying the interaxialdistance between the cylinders.

In this case, a greater space for arranging the marrying or laminatingroll is created around the first embossing cylinder. This allows one topass from the tip-to-tip configuration to the nested configurationwithout moving the embossing cylinders away from one another. Theexisting tip-to-tip embossing units may be easily modified so as to varythe mutual position of the axes of the pressure rolls and the embossingcylinders and introduce into the space thus formed a laminating roll,this making the unit suitable for producing also web material embossedand joined using the nested technique.

The embossing cylinders may have symmetrical tips arrangements or (inparticular when the device is operating in the nested configuration)non-symmetrical arrangements. The embossing cylinders may also bereplaced when the device changes over from the tip-to-tip configurationto the nested configuration, or vice versa. The phase-displacementbetween the tips of an embossing cylinder and the tips of the othercylinder may be obtained with an angular movement or also with a mutualaxial movement of the cylinders. In other words, while keeping one ofthe cylinders at a standstill, the other cylinder may be rotated aboutits axis, or translated parallel to its axis, by an amount such as tocause its tips to engage in between the tips of the other cylinder.

According to an advantageous embodiment of the present invention, it isalso envisaged that the two planes containing the axes of the embossingcylinders and the respective pressure rolls are inclined in directionssuch as to cause deformations which have components coinciding in theplane containing the axes of the two embossing cylinders. This isobtained by arranging the pressure roll associated with the firstembossing cylinder in an angular position which is further away from thenip and the pressure roll associated with the second embossing cylindercloser to the nip. The stresses exerted by the two pressure rolls thuscause, in the plane containing the axes of the two embossing cylinders,deformations in the same direction, which do not affect the conditionsof contact between the tips in the laminating nip also when theembossing unit operates using the tip-to-tip technique. A more uniformand regular product is thus obtained.

Further embodiments of the present invention are indicated in theaccompanying dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be better understood with reference to thedescription and the accompanying drawing, which shows a practicalexample of the invention itself. More particularly, in the drawing:

FIG. 1 shows a diagram of the device according to the invention;

FIG. 2 shows an enlarged schematic cross-section of the nip between thetwo embossing cylinders during tip-to-tip operation;

FIG. 3 shows an enlarged schematic cross-section of the nip between thetwo embossing cylinders during nested operation;

FIG. 4 shows an enlarged schematic cross-section of the laminating zoneduring nested operation;

FIG. 5 shows a side view, similar to FIG. 1, of a modified embodiment ofthe present invention; and

FIGS. 6 and 7 show an embodiment of the device according to the presentinvention in which the operative configuration can be changed byreplacement of a pair of sides and of the embossing cylinders ifnecessary.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

With initial reference to FIG. 1, the device comprises a pair ofembossing cylinders 1, 3, each of which is provided with a plurality oftips or projections 1P, 3P (schematically shown in FIGS. 2 to 4)arranged in symmetrical patterns on the two cylinders.

The two cylinders 1, 3 are mechanically joined together so as to rotatein opposed directions, as shown by the arrows f1 and f3, and at the sameperipheral speed. This may be obtained with a suitable choice oftransmission gears, not shown.

In a manner known per se the embossing cylinder 1 cooperates with apressure roll 5, while the cylinder 3 cooperates with a pressure roll 7.The two pressure rolls 5 and 7 are lined with a layer of resilientlyyielding material, for example rubber. Each pressure roll 5, 7 is biasedagainst the respective embossing cylinder 1, 3 by an actuator 9, 11.

Contrary to what happens in traditional embossing units, the pressurerolls 3 and 5 are not positioned either with their axes on a planeperpendicular to the plane containing the axes of the respectiveembossing cylinders 1 and 3, nor coplanar with the embossing cylinders.As can be seen in FIG. 1, the plane P3 containing the axes 1A and 5A ofthe embossing cylinder 1 and the pressure roll 5 forms an angle of about30° with the vertical.

The plane P5 containing the axis 3A of the embossing cylinder 3 and 7Aof the pressure roll 7 is also inclined at about 30° with respect to thevertical, but in the opposite direction with respect to the plane P3.

In FIG. 1 α and α′ indicate the two angles formed by the planes P3 andP5 with the plane P2 containing the axes 1A, 3A of the two embossingcylinders 1, 3. The two angles α and α′ are in this case supplementary(their sum is equal to 180°) and are obtained by displacing the pressureroll 5 associated with the first embossing cylinder 1 so as to move itaway from the nip G, while the pressure roll 7 has been moved towardsthe nip G.

The position of the pressure roll 5 makes available a space around thecylinder 1, between the roll 5 and the cylinder 3, for the arrangementof a marrying or laminating roll 13, cooperating with the cylinder 1,for the purposes clarified below. The laminating roll 13 is controlledby an actuator 15 so as to assume an active position, shown incontinuous lines in FIG. 1, where it is pressed against the surface ofthe embossing cylinder 1, and a non-active position, shown in brokenlines where it is not in contact with the cylinder 1.

Having arranged the pressure roll 5 inclined with respect to thevertical plane passing through the axis 1A of the embossing cylinder 1,a flexural stress is generated on the embossing cylinder 1, said stresshaving a horizontal component (in the plane P2 containing the axes 1Aand 3A of the cylinders 1 and 3) which causes a correspondingdeformation (camber) in the horizontal plane P2. This deformation wouldcause a high degree of compression of the projections 1P, 3P in theintermediate zone (in the direction of the axis of the cylinders 1, 3)of the laminating nip G, where the deformation of the cylinder 1 ismaximum. In order to avoid this, the pressure roll 7 is also displacedwith respect to the vertical containing the axis 3A, so that the stressexerted by the pressure roll 7 on the embossing cylinder 3 causes aflexural deformation of the latter in the plane P2 in the same directionas that caused by the pressure roll on the embossing cylinder 1. The twoaxes of the embossing cylinders 1 and 3 are thus deformed substantiallyby the same amount and in the same plane, such that the cooperatingprojections of the two cylinders are located substantially at the samedistance, i.e. are pressed with the same stress against one another,along the entire longitudinal extension of the laminating nip G, whenthe embossing/laminating unit is operating in the tip-to-tip condition.

The embossing cylinder 1 has, associated with it, an adhesive applicator17 of the type known per se. It comprises, in the example illustrated,two cylinders, the axes of rotation of which are coplanar with the axes1A, 3A of the two embossing cylinders 1, 3.

Two plies of material to be embossed, indicated by V1 and V3, aresupplied to the device described hitherto. 20 denotes a roll for guidingthe ply V3, while 21 and 23 denote two expansion rolls for the plies V1and V3, respectively. The ply V1 is embossed between the embossingcylinder 1 and the pressure roll 5, while the ply V3 is embossed betweenthe embossing cylinder 3 and the pressure roll 7. After embossing, anadhesive C is applied onto the ply V1 by means of the applicator 17 in amanner known per se.

The two plies V1 and V3 may, Skis point, be joined together in twodifferent ways depending on how the two embossing cylinders 1, 3 arephase-synchronized and the path which the plies follow downstream of thenip G between the embossing cylinders 1,3.

FIG. 2 shows an enlarged detail of the nip G between the two embossingcylinders 1, 3 in the position which they assume when the device isregulated to obtain tip-to-tip embossing. In this case the two cylinders1, 3 are phase-synchronized with each other so that the tips orprojections 1P of the cylinder 1 are in phase with the tips 3P of thecylinder 3, namely at the minimum inter-distance point between the twocylinders 1, 3 the tips of one press against the tips of the other one,laminating between them the embossed plies V1 and V3. The glue appliedonto the ply V1 causes mutual adhesion of the plies. Downstream of thenip G the web material formed by the two joined plies V1 and V3 followsthe path indicated by Npp. In this condition the laminating roll 13 iskept separated from the embossing cylinder 1.

FIGS. 3 and 4 show the arrangement of the embossing cylinders 1, 3 andthe laminating roll 13 in the case of nested embossing. The twoembossing cylinders 1 and 3 are arranged with the same interaxialdistance as the preceding example, but are differentlyphase-synchronized since the tips 1P of the embossing cylinder 1 areengaged in between the tips 3P of the embossing cylinder 3. The twoembossed plies V1 and V3 are not laminated in the nip G between the twoembossing cylinders 1, 3, but downstream of the nip G, between thelaminating roll 13 (which in this case is pressed against the tips 1P ofthe cylinder 1) and the embossing cylinder 1, as shown in the schematicenlarged view of FIG. 4. Downstream of the laminating roll 13, the webmaterial obtained from joining together of the plies V1 and V3 followsthe path Nn.

FIG. 5 shows a side view; similar to FIG. 1, of a modified embodiment ofthe present invention. The same numbers indicate parts which are thesame or correspond to those of the embodiment according to FIGS. 1 to 4.In this case the plane P2 is inclined with respect to the horizontal,and the planes P3 and P5 form angles α and α′ with the plane P2, whichare equal to each other. Both the pressure rolls 5 and 7 have been movedaway from the nip G.

With this configuration, the space for insertion of the laminating roll13 is again obtained, but there is no compensating effect on theflexural deformations of the two embossing cylinders 1 and 3 on theplane P2. It is therefore a configuration which is particularly suitablewhen the embossing device is intended mainly to operate using the nestedtechnique.

Both the configurations may be obtained with simple modifications of theexisting tip-to-tip embossing units, which may thus be rapidly convertedinto dual-purpose units.

FIGS. 6 and 7 show an embodiment of the device according to the presentinvention in which the conversion of the embossing cylinders arrangementto move from one type of embossing to the other or vice versa isparticularly simple. FIG. 6 shows the configuration for the nested modewhile FIG. 7 shows the same device in configuration for the tip-to-tipmode of operation.

The device in the configuration of FIG. 6 will firstly be described. InFIG. 6 same parts or parts corresponding to those of FIG. 5 areindicated with the same reference numbers increased by 100. The deviceincludes a first embossing cylinder 101 and a second embossing cylinder103, having rotation axes 101A and 103A arranged on a plane P102 whichis inclined with respect to the horizontal. The first embossing cylinder101 cooperates with a first: pressure roll 105 and the second embossingcylinder 103 cooperates with a second pressure roll 107, both pressurerolls being lined with a yielding material. The two pressure rolls 105and 107 are arranged above and below the inclined plane P102respectively, on which the axes 101A and 103A of the embossing cylinders101, 103 are arranged. The axes of pressure rolls 105 and 107 are shownat 105A and 107A, while P103 and P105 indicate respectively the planeincluding the axis 105A of the pressure roll 105 and the axis 101A ofembossing cylinder 101 on the one side and the axis 107A of pressureroll 107 and the axis 103A of the second embossing cylinder 103 on theother. The angles formed by the plane P102 with plane P105 and planeP103 respectively are shown at α and α′ respectively.

The first embossing cylinder 101 cooperates also with a laminating roll113 and with a glue applicator 117. Between the laminator roll 113 andthe pressure roll 105 a cleaning brush 116 operates, which has thefunction of cleaning the surface of the embossing cylinder 101.

The second embossing cylinder 103 is supported by a pair of sides, onlyone of which is shown in FIG. 6 and labeled 151. Each side 151 isdivided into two portions: the first portion 151A is pivoted at 153 tothe fixed structure 155 of the device and is provided with an arm 151Bupon which a thrust actuator 157 acts. The second portion 151C of theside 151 is mounted on portion 151A in such a way as to be removabletherefrom and is provided with seats for the bearings for embossingcylinder 103.

As it will be apparent from the drawing, by removing portion 151C of theside 151 the corresponding bearing 159 of the first embossing cylinder101 is made easily accessible thus allowing an easy disassembly andreplacement thereof.

The laminating roll 113 is supported by a pair of small sides 161pivoted at 163 to the fixed structure 155 of the device. Each small side161 is combined to a thrust actuator 115 acting upon it, equivalent toactuator 15 of FIG. 5, which pushes the laminating roll 113 against thefirst embossing cylinder 101.

Above each pivot 163 of the small sides 161 a seat 165 is provided forsupporting a further pressure roll which can be used in alternative tothe pressure roll 107 and to the laminating roll 113 as will be madeclear when describing the arrangement shown in FIG. 7.

The motion between embossing cylinders 101 and 103 is transmitted via agear train transmission. The latter allows, when requested, to modifythe angular phase between the two embossing cylinders in order to bringthe tips of one cylinder to correspond to the tips of the other(tip-to-tip mode of operation) or to be located in between the tips ofthe other cylinder alternatively (nested mode of operation). However, inthe arrangement of FIG. 6 the device operates preferably in the nestedmode and therefore the tips of the two embossing cylinders 101, 103 arearranged in such a way that they do not correspond to one another sothat the two plies V1, V2 are not laminated between the two embossingcylinders 101, 103 which are not in mutual contact. The plies are ratherlaminated between the first embossing cylinder 101 and the laminatingroll 113.

When it is desired to use the device of FIG. 6 in the tip-to-tip mode itis preferred to convert the configuration thereof moving to thearrangement shown in FIG. 7. The modification includes the replacementof portions 151C of the sides 151 with different portions 151D whichsupport a modified embossing cylinder 103′. The latter cooperates withembossing cylinder 101 which may be the same as in the arrangement ofFIG. 6 or may have been replaced with another having a differentembossing pattern. It has indeed been noticed that by moving from thenested-embossing mode to the tip-to-tip embossing mode it is preferableto replace both the embossing cylinders in order to use in each case apattern of tips which is specifically designed for the kind of embossingand lamination technique used. For this purpose the device of FIGS. 6and 7 has been designed in such a way that not only the pair of portions151C of sides 151 are easily disassembled, but also the first embossingcylinder 101 can be rapidly disassembled and replaced by means of a fastaccess to bearings 159 thereof.

The new embossing cylinder 103′ cooperates with a pressure roll 107′replacing pressure roll 107 (which remains inactive or may be removed).The pressure roll 107′ is supported by small sides 171 pivoted near seat165. Each small side 171 is connected to the same thrust actuator 115which in the arrangement of FIG. 6 acts on the small sides supportingthe laminating roll 113. The latter has been removed in order to providethe room necessary for the pressure roll 107′. Therefore, in thisarrangement the actuator 115 performs the function of actuator 11 of thedevice shown in FIG. 5, while in the arrangement of FIG. 6 said functionwas performed by actuator 111.

It should be noted that the embossing cylinder 103′ may be actuallydifferent from cylinder 103 (e.g. it may have a different pattern), orit may be the same cylinder 103 arranged in a different position.

On the side portions 151D an auxiliary deflecting roll 177 is alsoprovided for deflecting the ply V2, whose path is different from thepath followed in the arrangement of FIG. 6.

It is understood that the drawing shows only one example provided solelyby way of a practical demonstration of the invention, the forms andarrangements of said invention being able to be varied, without therebydeparting from the scope of the idea underlying the invention itself.The presence of any reference numbers in the accompanying claims has thepurpose of facilitating reading of the claims with reference to thedescription and the drawing and does not limit the scope of protectionrepresented by the claims.

What is claimed is:
 1. A device for embossing and laminating a multipleply web material, comprising: a first embossing cylinder having a firstaxis and a second embossing cylinder having a second axis, the firstembossing cylinder and the second embossing cylinder each having tipsthereon and each being arranged adjacent to one another such that thefirst axis and the second axis are parallel to one another and containedwithin a first plane, wherein the first embossing cylinder and thesecond embossing cylinder form a nip therebetween and rotate at a commonperipheral speed and in opposite directions; a first pressure rollhaving a third axis, the first pressure roll cooperating with the firstembossing cylinder, and a second pressure roll having of fourth axis,the second pressure roll cooperating with the second embossing cylinder,wherein a second plane contains the first axis and the third axis and athird plane contains the second axis and the fourth axis; an adhesiveapplicator associated with the first embossing cylinder; and alaminating roll arranged downstream of the nip and cooperating with thefirst embossing cylinder; wherein the first embossing cylinder and thesecond embossing cylinder are constructed and arranged to bephase-synchronized with each other so that the tips of the firstembossing cylinder are opposite the tips of the second embossingcylinder in a tip-to-tip relation, or the tips of either the firstembossing cylinder or the second embossing cylinder are positionedbetween the tips of the second embossing cylinder or the first embossingcylinder, respectively, in a nesting relation, and wherein the secondplane is inclined with respect to the first plane at a first angle otherthan 0° and 90° and the third plane is inclined with respect to thefirst plane at a second angle other than 0° and 90°, and the first angleis directed downstream of the nip and is greater than 90°.
 2. Device asclaimed in claim 1, wherein distance between the first axis and thesecond axis remains substantially unvaried when changing from thetip-to-tip relation to the nesting relation or vice versa.
 3. Device asclaimed in claim 2, wherein the second plane and the third plane areinclined with respect to the first plane so as to cause in the firstembossing cylinder and the second embossing cylinder flexuraldeformations with components coinciding in the first plane.
 4. Device asclaimed in claim 3, wherein the first angle and the second angle aresupplementary angles.
 5. Device as claimed in claim 1, wherein thesecond plane and the third plane are inclined with respect to the firstplane so to cause in the first embossing cylinder and the secondembossing cylinder flexural deformations with components coinciding inthe first plane.
 6. Device as claimed in claim 5, wherein the firstangle and the second angle are supplementary angles.
 7. Device asclaimed in claim 1, wherein the first angle is equal to the secondangle.
 8. Device as claimed in claim 7, wherein the first plane isinclined with respect to the horizontal.
 9. Device as claimed in claim1, 2, 5, 3, 6 or 4, wherein the laminating roll is moveable between aposition wherein the laminating roll presses against the first embossingcylinder or is spaced from the first embossing cylinder.
 10. Device asclaimed in claim 1, 2, 5, 3, 6, or 4, wherein the first plane is ahorizontal plane.
 11. Device as claimed in claim 1, 2, 5, 3, 6 or 4,wherein the first pressure roll and the second pressure roll arearranged one on top of the other underneath the first embossing cylinderand the second embossing cylinder, respectively.
 12. Device as claimedin claim 1, 2, 5, 3, 6, and 4, wherein the first angle is between 95°and 130°.
 13. Device as claimed in claim 1, 2, 5, 3, 6 or 4, wherein thesecond embossing cylinder is supported by sides made up of two portionswhich can be disassembled in order to easily replace the secondembossing cylinder.
 14. Device as claimed in claim 13, wherein upondisassembly of the two portions, bearings of the first embossingcylinder are made accessible.
 15. Device as claimed in claim 13, furthercomprising a third pressure roll, the third pressure roll cooperatingwith the second embossing cylinder or the second pressure roll. 16.Device as claimed in claim 1, 2, 5, 3, 6 or 4, further comprising afirst pair of disassemblable side portions supporting the secondembossing cylinder and a second pair of disassemblable side portionssupporting the second embossing cylinder, said first and said secondpair of disassemblable side portions having seats for bearings of thesecond embossing cylinder arranged at different heights and being usablealternatively.
 17. Device as claimed in claim 16, wherein the secondpair of side portions support an auxiliary deflecting roll.